28920225834120 has 32 divisors (see below), whose sum is σ = 86760677502720. Its totient is φ = 7712060222400.

The previous prime is 28920225834119. The next prime is 28920225834161. The reversal of 28920225834120 is 2143852202982.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28920225834120.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120500940856 + ... + 120500941095.

It is an arithmetic number, because the mean of its divisors is an integer number (2711271171960).

Almost surely, 2^{28920225834120} is an apocalyptic number.

28920225834120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28920225834120 is an abundant number, since it is smaller than the sum of its proper divisors (57840451668600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28920225834120 is a wasteful number, since it uses less digits than its factorization.

28920225834120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241001881965 (or 241001881961 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The spelling of 28920225834120 in words is "twenty-eight trillion, nine hundred twenty billion, two hundred twenty-five million, eight hundred thirty-four thousand, one hundred twenty".